Highest Common Factor And Least Common Multiple MCQ Set 5

Showing question 21 to 25 of total 54 MCQs

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Question No: 21

Six bells commence tolling together and toll at the intervals of 2,4,6,8,10,12 seconds resp. In 60 minutes how many times they will toll together.

1. 15
2. 16
3. 30
4. 31

Question No: 22

An electronic device makes a beep after every 60 sec. Another device makes a beep after every 62 sec. They beeped together at 10 a.m. The time when they will next make a beep together at the earliest, is

1. 10:28 am
2. 10:30 am
3. 10:31 am
4. None of above

Question No: 23

The greatest possible length which can be used to measure exactly the lengths 7 m, 3 m 85 cm, 12 m 95 cm is

1. 16cm
2. 25cm
3. 15cm
4. 35cm

Question No: 24

The ratio of two numbers is 3 : 4 and their H.C.F. is 4. Their L.C.M. is

1. 48
2. 22
3. 56
4. 27

Question No: 25

The H.C.F. and L.C.M. of two numbers are 12 and 5040 respectively If one of the numbers is 144, find the other number

1. 400
2. 256
3. 120
4. 420